These tools should allow you to to monitor/graph things like MAF readings and Ignition timing.

The other thing you should do it search the forum here to run a real time MAF test. This has you run a full throttle run in 2nd or 3rd gear and monitor the maximum MAF reading. Then you adjust for altitude and air temperature and see if the MAF is reading the correct. If the MAF measurement is way off, usually it means the MAF is not measuring correctly. Incorrectly functioning MAF at high RPM can impact fuel and ignition timing.